成岩型铁锰结核
diagenetic ferromanganese nodules
大洋铁锰结壳
oceanic ferromanganese crusts
非转铁蛋白结合铁
non transferrin bound iron
复合碳硅锰铁合金
complex carbon ferro-silico-manganese alloy
高碳锰铁合金
high carbon ferromanganese
海山铁锰结壳
seamount ferromanganese crusts
铝锰铁合金
aluminum-ferromangamese alloy
Fe-Al-Mn alloy